linux-kernel - Re: [BUG v6.0-rc2] lockdep splat on ct_kernel

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Message-ID: <20220822182850.32f91017@gandalf.local.home>
Date:   Mon, 22 Aug 2022 18:28:50 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Frederic Weisbecker <fweisbec@...il.com>,
        "Paul E. McKenney" <paulmck@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>
Subject: Re: [BUG v6.0-rc2] lockdep splat on ct_kernel_enter()

On Mon, 22 Aug 2022 16:44:04 -0400
Steven Rostedt <rostedt@...dmis.org> wrote:

> Looks like lockdep and the trace_rcu_dyntick() code is getting out of sync
> with respect to whether or not interrupts are enabled.

This is caused by this commit:

172114552701 ("rcu/context-tracking: Move RCU-dynticks internal functions
to context_tracking")

The warning happens with the commit, and does not for the commit just
before it is applied.

-- Steve